Drive-chain



(N o Model.) 7

H. W. 85 P. G. CALDWELL.

, DRIVE CHAIN. No. 307,011. Patented Oct. 21, 1884.

e. If 1.4.-

W I/II/III/ N. PETERS.Fhumlilhographer, Wnhlngmm D. C.

N'ITED STATES PATENT OFFICE.

HENRY W. CALD WVELL AND FRANK O. CALDWELL, OF CHICAGO, ILLINOIS.

DRIVE-CHAIN.

SPECIFICATION forming part of Letters Patent No. 307,011, dated October21, 1884.

A pplication filed July 28, 1884.

To all whom it may concern.-

Be it known that we, HENRY W. CALDWELL and FRANK C. CALDWELL, residingat Chicago, in the county of Cook and State of Illinois, and citizens ofthe United States, have invented new and useful Improvements inDrive-Chains, of which the following is a full description, referencebeing had to the accompanying drawings, in which Figure 1 is anelevation showing two of our links connected together. Fig. 2 is a blankfrom which a link is formed. Fig. 3 1s a vertical section showing thelower end of the link bent around a wire or pin, as hereinafterdescribed. Fig. 4 is a vertical section showing the central part, 9,shown in Fig. 2, bent over against the part a. Fig. 5 shows the parts ag bent over to form the open hook.

Our invention relates to improvements in drive-chains the links of whichcan be readily separated from each other; and the object of ourimprovement is to provide drive-chain links made from sheet metal, whichwill be strong and which will not be likely to be accidentally separatedone from another when in use in a chain, and which can be easilyconnected together and detached from each other, which object we attainas illustrated in the drawings, in which- A B represent two of our linksconnected together.

C shows the form of the blanks from which the hooks may be made, whichblanks are cut from sheet metal.

a is that part of the blank from which the open hook I) of the link ismade by bending into proper shape.

0 is that part of the blank from which the end bar, d, of the link isformed by bending it into proper shape. This part 0 must be long enoughto permit it to be turned over upon itself, or around a piece of wire,and

(N0 model.)

when so formed this bar will have sufficient size and strength.

e f are the side bars. As shown in Fig. 3, the central part of theblankis cut out entirely. To secure a suffioientlystrong hook we-cut thecentral part of the blank on three sides, as shown in Fig. 2, and do notdetach this central part from the blank, but turn such part 9 overagainst the part a, as shown in Fig. 4, and then bend the two parts a 9into proper shape to form an open hook, as shown in Fig. 5. The openingit of the hook is to be large enough to permit it to be passed over oneof the side bars, 0 f, to couple the links together or detach them fromeach other; but such opening is not to be large enough to allow the bardto pass through it. The wire or pin 11 is shown in Fig. 3, over whichthe part 00f the blank is turned to form the bar (I, and the use of thiswire or pin facilitates the turning of the part a into proper shape, andalso gives 1 additional strength, such wire or pin 73 being left in thecenter of the part (I, and when used forming a part thereof.

What we claim as new, and desire to secure by Letters Patent, is-

1. A sheet-metal drive-chain link having its hook portion re-ent'orcedby an extra thickness of metal cut and bent from the body of the link,substantially as described.

2. A sheet-metal drive-chain link having its hook portion re-enforced byan extra thickness of metal cut and bent from the body of 75 the link,and its end bar formed by bending, the metal upon itself, substantiallyas described.

HENRY WI CALDWELL. FRANK o. CALDWELL.

'W'itnesses:

ALBERT H. ADAMS, HARRY T. JONES.

